Crushing and grinding machine



Mar. 13, 1923. 1,448,013

J. A. WARREN CRUSHING AND GRINDING MACHINE Filed Nov. '7, 1921 2 sheets-sheet l Mar. 13, 1923.

J. A. WARREN cRUsHING AND GRINDING MACHINE Patented Mar. 13, 1923. p

UNITED STATES PATENT' OFFICE,

JAMES A. WARREN,AOE DENVER, COLORADO.

I CR'USHINGv AN'D GRINDING MAGHINE Appnoauon mea November 7, 1921. serial 513,425.

To all whom t ma concern:

Be it known that JAMES A. WARREN, a citizen of the United States, residing at Denver, in the county] of Denver and State of Colorado have invented certain new and useful mprovements in Crushing and Grinding Machines, of which the following is a specification. y

This invention relates to crushing and grinding machines and its main object is to provide a reduction or comminuting machine in which the pressure or grinding membersv fare composed of endless belts or aprons constructed and Supported in conformity with the endless tracks of tractors.

Another object of the invention is to provide in a machine of the above described character, an endless belt which is composed of a continuous succession of Contact members supported upon the links of a plurality of parallel chains. A further object is to provide in a crushing and grinding machine of the type mentioned, pressure members composed of endless belts which move at a constantly varying velocity in .inverse or reciprocal ratio to each other; another object is to arran e the moving pressuremembers of the mac 'ne-with relation to cach other so that the working surface of one moves in a plane which is askew or oblique to that of the other, and still further objects reside in details of construction and a novel arrangement of parts all of -which .will fully appear in the following description in which reference is had to the accompanying drawings.

My vimproved crushing and grinding machine is particularly adapted for the disintegration of shale in a process of recovering its valuable constituents and it may be effectively employed for the comminution of other ma-terials such as' .mineral ores, which are suitable for reduction by the combined crushing, grinding and tearing forces produced in the operationv of the present invention.

In the drawings in the several views of which like parts are similarly designated,

Figure 1 represents a sectional elevation of my improved j crushing and grlnding machine;

Figure 2 a section on the line 2 2, Figure I chine, looking in the direction of the arrow drawn across thev line 4 4, in Figure 2; and

Figure 5, a view similar to Figure 1.

drawn to a greatly reduced scale and showing a modification inthe construction of the i crushing and grinding' members, which adapts it for pulverization.

Referring. more in detail to the drawings, the reference numeral 2 designates an upright frame which is supported upon a suitable foundation structure 3. The frame provides a support and housing for the crushing and grinding members 4 and 5 and it has respectively at its upper and lower ends a hopper 6 through which the material under treatment is fed between the pressure members, and a contracted spout 7 through which thedisintegrated material is ldelivered to a suitable receptable or conveyor.

The crushing and grinding members consist of endless belts or aprons composed of a plurality of parallel chains 8 the links of will be seen that by the abovev described arrangement, the stresses to which the members are subjected in the operation of the machine, are evenly dividedamong the separate chains, the number of which'is varied in accordance to the required width of the working surfaces of the members.

The two members are placed in the frame or housing below the hopper in converging relation -to each other and they are separated at their lower ends above the discharge spout tov provide a narrow throat which determines thesize to which the material Afed between the members is reduced by their conjoint operation.

The working stretches of the endless belts at their inner sides, which in the ope-ration oi the machine move do\\\'nwardly, are suported to withstand the stresses of the crushlng action by series of friction rollers 13 engaging with their respective chains and mounted on rails 14 which by means of boxes 15, are connected between the upper and lower shafts of each of the members.

Scrapers 16 attached to the rails engage with the contact plates of the members at the outer sides thereof for the removal of adhering matter. One of the two members is mounted to swing about the axis of its upper shaft to yield for the passage of uncrushable objects inadvertently fed to the machine with the material under treatment. lts lower shaft is to. this end, mounted in boxes 17 which are movably supported in arcuate slideways 18 in the sides of the housing, and the boxes bear against shearing pins 19 adapted to break under stress.

rlhe shafts of one of the crushing members are placed out of parallel to those of the other whereby to cause the working stretch of the respective endless belt to move in a plane which is askew or oblique to that of the corresponding portion of the belt of the other member.

This arrangement of the two members imparts a lateral movement to the material which together with its downward motion with and along the crushing surfaces of the belts, subjects'the particles of the material to intersecting forces which greatly promote their disintegration and reduction.

Aside from the actions above referred to, the material fed between the pressure members is subjected to a tearing force by a differential movement of its endless belts. This movement is obtained by causing each belt to move at a constantly varying velocity in inverse or reciprocal ratio to that of the other so that the material is constantly subjected to two different downward propelling forces. The varying movements of the belts of the two members also tend to equalize the wear on the working surfaces thereof, since by the proportionately changing velocities, the propelling function is alternately transferred from one to the other.

The differential movements of the two bands are produced through the instrumentality of eccentric gear wheels 20 and 21, the oblique teeth of which are in constant mesh, and a transmission gearing 22 and 23 which imparts motion to one of said wheels by its connection with a conveniently located source of mechanical energy.

In the modified construction illustrated in Figure 5 of the drawings, the two crushing Lessors and grinding members have the working stretches of their belts bent at an angle to provide .below converging upper portions 24, vertically extending parallel lower portionsI 25 which grind or pulverize the material moving between them A machine of the modified construction may be used in conjunction with the first described machine to further disintegrate the product thereofl to a uniform size of predetermined mesh. j

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A crushing and grinding machine comprising a pressure member composed of an endless chain, and contact members on the links thereof, in lapping relation to each other.

2. A crushing and grinding machine comprising a pair of downwardly converging endless belts one of which is mounted to swing outwardly with relation to the other, and means to yieldingly hold the movable belt in its normal position.

3. A crushing and grinding machine comprising a pair of downwardly converging endless belts one of which is mounted to swing outwardly with relation to the other, and a shearing pin holding the movable belt in its normal position.

4. A crushing and grinding machine comprising a pair of converging endless belts,

and operating mechanism adapted to run each belt at a constantly varying velocity in inverse ratio to that of the other.

5. A crushing and grinding machine comprising a pair of converging endless belts, and operating mechanism adapted to run each belt at a constantly varying velocity in inverse ratio to that of the other and including a pair of meshing eccentric gear wheels, and means for their rotation.

6. A crushing and grinding machine comprising a air of downwardly converging endless be ts, and operating mechanism adapted to run said belts simultaneously in opposite directions and at diierent velocities.

7. A crushing and grinding machine comprising two converging pressure members each composed of an endless belt trained to y of which extend obliquely with relation to each other.

9. A crushing and grinding machine comprising two downwardly converging endless belts,.opposed surfaces co-operative working of which extend partially convergingly and partially in parallel with relation to each 5 other.

10. A crushing and grinding machine comprising a pressure member including a pair of shafts, sprocket wheels thereon, an

endless belt carried on the sprocket wheels, a relatively stationary frame supported by 10 the shafts, and anti-friction rolls on saidl frame, inside the belt and supporting the working stretch thereof.

In testimony whereof I have alxed'my signature.

' JAMES A. WARREN. 

